EP0642451B1 - Fermeture en plastique et procede pour sa fabrication - Google Patents

Fermeture en plastique et procede pour sa fabrication Download PDF

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Publication number
EP0642451B1
EP0642451B1 EP94908935A EP94908935A EP0642451B1 EP 0642451 B1 EP0642451 B1 EP 0642451B1 EP 94908935 A EP94908935 A EP 94908935A EP 94908935 A EP94908935 A EP 94908935A EP 0642451 B1 EP0642451 B1 EP 0642451B1
Authority
EP
European Patent Office
Prior art keywords
spring elements
plastic closure
closure
springs
plastic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94908935A
Other languages
German (de)
English (en)
Other versions
EP0642451A1 (fr
Inventor
Werner Fritz Dubach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Medisize Schweiz AG
Original Assignee
Createchnic AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Createchnic AG filed Critical Createchnic AG
Publication of EP0642451A1 publication Critical patent/EP0642451A1/fr
Application granted granted Critical
Publication of EP0642451B1 publication Critical patent/EP0642451B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0081—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor of objects with parts connected by a thin section, e.g. hinge, tear line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • B29C45/4407—Removing or ejecting moulded articles for undercut articles by flexible movement of undercut portions of the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B65D47/08—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having articulated or hinged closures
    • B65D47/0804—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having articulated or hinged closures integrally formed with the base element provided with the spout or discharge passage
    • B65D47/0809—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having articulated or hinged closures integrally formed with the base element provided with the spout or discharge passage and elastically biased towards both the open and the closed positions
    • B65D47/0814—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having articulated or hinged closures integrally formed with the base element provided with the spout or discharge passage and elastically biased towards both the open and the closed positions by at least three hinge sections, at least one having a length different from the others
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D1/00—Pinless hinges; Substitutes for hinges
    • E05D1/02—Pinless hinges; Substitutes for hinges made of one piece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
    • B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2999/00—Subject-matter not otherwise provided for in this subclass

Definitions

  • the present invention relates to a plastic closure according to the preamble of claim 1.
  • the main film hinge is interrupted by a spring element arranged in between and is reduced to two parts of the main film hinge remaining on both sides of the spring element.
  • the main film hinge or the parts of the main film hinge are offset to the outside in relation to the circumference of the closure in all embodiments. In addition to the aesthetic inadequacy, this results in a considerable reduction in the length of the main film hinge, and accordingly means a weakening of the hinge and thus of the entire plastic closure.
  • the length of the main film hinge is again limited to the distance between the two spring elements.
  • the spring elements which here are either spiral springs or tension elements, which run with their secondary film hinges into an extremely short main film hinge. On the one hand, this results in an imprecise closing process and on the other hand reduces the stability of the hinge.
  • closures according to claim 1 can be realized by means of the method according to claim 9.
  • FIGS. 1 and 2 represents a closure for a rectangular container, for example for holding washing powder
  • the closure according to FIGS. 3 to 5 is suitable, for example, for mounting on a plastic bottle for cosmetics or liquid or pasty foods.
  • the plastic closure according to FIG. 1 has a rectangular basic shape.
  • This closure is suitable to be placed on an open, rectangular container. It has a first part 1 and a second part 2.
  • the two closure parts 1 and 2 are connected to one another via a continuous main film hinge 3.
  • Two U-shaped spring elements 4 cross the main film hinge 3 at two different, relatively far apart locations.
  • the closure part 2 is provided with two fastening elements 5, each arranged in the vicinity of the two U-shaped spring elements.
  • the fastening elements 5 serve to fasten the closure on the rectangular container, not shown here.
  • the U-shaped spring element 4 is connected via a secondary film hinge 7 to a resilient console structure on both sides of the main film hinge 3 on the one hand to the closure part 1 and on the other hand to the closure part 2.
  • the main film hinge 3 and the two secondary film hinges 7 run parallel to one another.
  • the distance between the two spring elements 4 corresponds to a multiple of the sum of the width of the two spring elements.
  • the distance between two adjacent spring elements is at least twice as long as the width of the at least one spring element.
  • a closure with the same structure can also be produced in different other embodiments.
  • the position of the main film hinge 3 is not fixed in any way.
  • Such a plastic closure can also have a round or polygonal layout and the main film hinge can cross such a closure in any position.
  • the main film hinge 3 runs across the closure surface without any interruption.
  • the shape of the spring elements 4 is also not mandatory. They only have to be designed spatially so that they bridge the main film hinge 3 with a sufficient space.
  • the cross-sectional shape of such a spring element can be U-, V-shaped or semi-cylindrical.
  • FIGS. 3 to 5 show a detailed exemplary embodiment of a plastic closure according to the invention, which is suitable for attachment to a container, in particular a plastic bottle with a liquid or pasty content.
  • the three main components of the plastic closure are the first closure part, which forms the lower part 10, the second closure part, which here is the cap 20, and the hinge 30 integrally connecting the two closure parts 12, with the exception of a pouring opening 13, is completely sealed.
  • a fastening means 16 for holding the plastic closure on a container is provided in the lower region.
  • the fastening means 16 can have various configurations, such as, for example, a thread, retaining knobs or, as shown here, an annular bead.
  • the second closure part which is designed here as a cap 20, likewise has a cylindrical jacket wall 21 which has the same diameter as the jacket wall of the lower part 10.
  • the cap 20 is closed by a cover surface 22.
  • a sealing pin 23 is arranged centrally on the inner surface of the cover surface 22. This fits snugly into the pouring opening 13 of the lower part 10.
  • a press-on bead 24 is formed on the lower edge of the jacket wall 21. The press-on bead 24 serves as an aid for opening the plastic closure.
  • the outer design of the plastic closure is by no means limited to cylindrical shapes. For example, polygonal or oval shapes are possible, as are closures with tapered jacket walls.
  • the hinge designated as a whole by 30, consists of two main components, namely the main film hinge 31 and the spring element 32.
  • the spring element 32 in the embodiment shown here is on the one hand for manufacturing reasons and on the other hand to set the snap action to a reasonable level, in two partial spring elements 33 divided up. An intermediate space 34 thus remains between the two partial spring elements 33. If the spring element 32 of the plastic closure were again manufactured in the injection mold by means of a side pull or slide, as in the previously described solution, the spring element 32 could be continuous, i.e. 1 and 2.
  • the spring element 32 is connected on the one hand to the lower part 10 and on the other hand to the cap 20 via thin points 36, which are shaped as secondary film hinges. When the plastic closure is fully open, the two thin points 36 are at the same level. To achieve this, a corresponding bracket 37 is provided on both the lower part 10 and the cap 20.
  • the plastic closure according to FIGS. 3 to 5 is equipped with a hinge according to FIGS. 6 and 7.
  • the two jacket walls 11 and 21 of the two closure parts are connected to one another in an articulated manner via the main film hinge 21.
  • the view according to FIG. 6 clearly shows the intermediate space between the two partial spring elements 33, while this cannot be seen in FIG. 7 because the sectional plane runs in the intermediate space 34.
  • the two U-shaped partial spring elements running parallel to one another are arranged such that the respective bottom of the U is directed upwards when the plastic closure is fully open.
  • the cross-sectional area of the two U-shaped partial spring elements 33 is designed in the region of their bottoms 35 in such a way that their thicknesses decrease from the outside towards the intermediate space 34.
  • the inner surfaces 38 are thus inclined to one another and enclose an acute to obtuse angle alpha.
  • the other elements of the hinge namely the two thin points 36 and the brackets 37, can also be seen here.
  • the outer side surfaces of the two partial spring elements 33 are identified by 39. The labeling takes place especially with regard to the later explanation of the manufacturing technology.
  • the thin points 36 are arranged on the outer surfaces of the U and form the connection between the brackets 37 and the spring element 32
  • the thin points 36 in the embodiment according to FIGS. 8 and 9 are also the lashing points of the spring element 32 on the lower part 10 or on the cap 20. Of course, they could of course also establish the connection to the plastic closure parts via appropriate brackets.
  • the constriction to form the thin spots 36 does not take place from the outside of the U-shaped spring element, but from the inside thereof. So that the partial spring elements 33 are not sheared during the demolding, the transition from the thin points 36 to the base 35 must run continuously.
  • the legs of the U-shaped partial spring elements 33 have a rectangular cross-section in their straight-running region, these legs have a continuously changing trapezoidal cross-sectional shape.
  • the U-shaped partial spring elements consequently have a cross-sectional shape tapering in the direction of the intermediate space 34 over their entire length between the two thin points 36 and the lower part 10 or the cap 20.
  • the inner surfaces 38 of the two partial spring elements 33 thus always run inclined to one another, except in the area of the thin point 36.
  • FIG. 10 shows schematically how a horizontal section through such a multi-part tool can look in the area of the hinge.
  • a tool part I which essentially forms the entire surface structure of the lower part on the surface and the cap on the inner surface, also delimits the outer side surfaces 39 of the two partial spring elements 33.
  • An inner, stamp-shaped tool part II forms the inner boundary surfaces 38 of the partial spring elements 33 outer boundary surfaces of the two partial spring elements are formed by a tool part III.
  • FIGS. 11a to 11d This situation is shown again schematically in FIGS. 11a to 11d during the demolding process.
  • the fully closed injection mold can be seen in FIG. 11a.
  • the black filled areas show the two partial spring elements on average in the area of the two U-floors.
  • the tool part I is removed in a first demolding step.
  • the plastic closure according to the invention enables the design of particularly aesthetic embodiments and can also be mass-produced without additional costs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Closures For Containers (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Cable Accessories (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Claims (12)

  1. Fermeture en matière plastique, constituée d'une première partie (10) pour la fixation directe ou indirecte sur un récipient et d'une deuxième partie (20) servant de capuchon, qui est reliée d'un seul tenant à la première partie par l'intermédiaire d'au moins une charnière pelliculaire principale (31), et dans laquelle est présent au moins un élément de ressort (32) en forme de U, agissant sur les deux parties, surmontant l'axe de rotation de la charnière pelliculaire principale et produisant un effet de déclic, caractérisée en ce que la charnière pelliculaire principale (31) s'étend de façon ininterrompue dans la région dans laquelle elle est surmontée par le ou les éléments de ressort (32), et en ce qu'à l'état fermé de la fermeture, l'élément de ressort (32) est invisible, totalement à l'intérieur de la fermeture fermée.
  2. Fermeture en matière plastique selon la revendication 1, caractérisée en ce que la distance entre deux éléments de ressort voisins (32) est au moins égale au double de la largeur du ou de chaque élément de ressort.
  3. Fermeture en matière plastique selon la revendication 1, caractérisée en ce que le ou chaque élément de ressort (32) est constitué d'au moins deux éléments partiels de ressort (33) en forme de U s'étendant parallèlement entre eux, qui laissent libre un espace intermédiaire (34).
  4. Fermeture en matière plastique selon la revendication 3, caractérisée en ce que les faces intérieures (38) des éléments partiels de ressort (33) en forme de U s'étendent, au moins dans la région des deux fonds de U (35), en inclinaison vers l'espace intermédiaire (34) entre les deux éléments partiels de ressort (33), de sorte que les épaisseurs des deux éléments partiels de ressort se rétrécissent en direction de l'espace intermédiaire.
  5. Fermeture en matière plastique selon la revendication 3, caractérisée en ce que les liaisons articulées entre les éléments de ressort (32) et la partie inférieure (10) ou, respectivement, le capuchon (20) s'effectuent au moyen de régions amincies (36), disposées dans les faces extérieures des éléments partiels de ressort (33) en forme de U et s'étendant au moins approximativement parallèlement à la charnière pelliculaire principale (31).
  6. Fermeture en matière plastique selon la revendication 4, caractérisée en ce que les éléments partiels de ressort (33) en forme de U présentent sur toute leur longueur, entre les deux régions amincies (36) et la partie inférieure (10) ou, respectivement, le capuchon (20), une forme de section se rétrécissant en direction de l'espace intermédiaire (34).
  7. Fermeture en matière plastique selon la revendication 1, caractérisée en ce que la partie inférieure (10) présente une face de recouvrement (12) dans laquelle est disposée une ouverture de déversement (13), une cuvette fermée (15) étant disposée dans la face de recouvrement (12) dans la région située entre l'ouverture de déversement (13) et la charnière pelliculaire principale (31), cuvette dans laquelle le ou les éléments de ressort (32) se logent au moins partiellement à l'état fermé de la fermeture.
  8. Fermeture en matière plastique selon la revendication 1, caractérisée en ce que le ou les éléments de ressort (32) sont reliés au moyen de régions amincies articulées (36) à la partie inférieure (10) ou, respectivement, au capuchon (20), les régions amincies articulées (36) étant disposées sur des consoles (37) qui se trouvent d'une part sur une face de recouvrement (12) de la partie inférieure et d'autre part sur la face intérieure (22) du capuchon (20).
  9. Procédé de fabrication d'une fermeture en matière plastique selon la revendication 1, caractérisé en ce que la fermeture est moulée par injection au moyen d'un noyau en plusieurs parties (I, II, III), la partie de noyau (II), qui soutient le ou les éléments de ressort (32) en forme de U, s'étendant entièrement au-dessus de la charnière pelliculaire principale interrompue (31), sur le côté se trouvant à l'intérieur de la fermeture fermée à l'état fermé de la fermeture, et étant retirée du ou des éléments de ressort (32) en forme de U sans intersection avec cette charnière, perpendiculairement ou parallèlement à la direction de développement de la charnière pelliculaire principale.
  10. Procédé selon la revendication 9, caractérisé en ce que la face intérieure (38) du ou des éléments de ressort (32) en forme de U est formée au moyen d'au moins une partie de noyau (II) s'étendant parallèlement à la charnière pelliculaire principale (31), partie qui est conçue comme tiroir.
  11. Procédé selon la revendication 9 pour la fabrication de la fermeture en matière plastique selon la revendication 3, caractérisé en ce que, lors du démoulage, on enlève au cours d'une première étape la partie de noyau (I), qui dégage la délimitation des faces de délimitation latérales (39) qui sont opposées à l'espace intermédiaire (34), et on retire au cours d'une deuxième étape la partie de noyau (II), qui soutient les éléments partiels de ressort (33) en forme de U et remplit l'espace intermédiaire entre les éléments partiels de ressort, en poussant alors provisoirement les éléments de ressort latéralement, sous déformation en élasticité de ressort, dans l'espace libéré.
  12. Procédé selon la revendication 11 pour la fabrication de la fermeture en matière plastique selon la revendication 5, caractérisé en ce que le noyau de moulage par injection (I, II, III) est au moins en trois parties, et en ce qu'après avoir enlevé la partie de noyau (II), qui s'enfonce dans l'espace intermédiaire entre les éléments de ressort, on retire une troisième partie de noyau (III), qui forme les faces latérales extérieures pourvues des régions amincies, les éléments de ressort déjà intérieurement dégagés étant, lors du démoulage, temporairement comprimés élastiquement à la distance minimale entre les deux régions amincies.
EP94908935A 1993-03-30 1994-03-24 Fermeture en plastique et procede pour sa fabrication Expired - Lifetime EP0642451B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH00971/93A CH687253A5 (de) 1993-03-30 1993-03-30 Kunststoffverschluss.
CH971/93 1993-03-30
PCT/CH1994/000064 WO1994022732A1 (fr) 1993-03-30 1994-03-24 Bouchage en plastique

Publications (2)

Publication Number Publication Date
EP0642451A1 EP0642451A1 (fr) 1995-03-15
EP0642451B1 true EP0642451B1 (fr) 1997-05-21

Family

ID=4199466

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94908935A Expired - Lifetime EP0642451B1 (fr) 1993-03-30 1994-03-24 Fermeture en plastique et procede pour sa fabrication

Country Status (9)

Country Link
US (1) US5494185A (fr)
EP (1) EP0642451B1 (fr)
JP (1) JP2774241B2 (fr)
AT (1) ATE153297T1 (fr)
AU (1) AU6200994A (fr)
CH (1) CH687253A5 (fr)
DE (1) DE59402817D1 (fr)
ES (1) ES2102843T3 (fr)
WO (1) WO1994022732A1 (fr)

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DE10397013B4 (de) * 2002-12-10 2018-10-18 HSM Lackiersysteme 1. Patentverwertungs UG (haftungsbeschränkt) Einwandiger Spritzpistolenbecher
US7243816B2 (en) * 2003-02-13 2007-07-17 Dart Industries Inc. Container with one-piece seal and lid spring
US20070062964A1 (en) * 2005-09-20 2007-03-22 Item Source, Llc Reclosable container with easily openable closure
DE102005056440A1 (de) * 2005-11-26 2007-05-31 Kennametal Inc. Spannvorrichtung
US7685676B2 (en) * 2006-02-24 2010-03-30 Mc Clellan W Thomas Living hinge
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Also Published As

Publication number Publication date
ATE153297T1 (de) 1997-06-15
ES2102843T3 (es) 1997-08-01
DE59402817D1 (de) 1997-06-26
WO1994022732A1 (fr) 1994-10-13
JP2774241B2 (ja) 1998-07-09
US5494185A (en) 1996-02-27
EP0642451A1 (fr) 1995-03-15
JPH072265A (ja) 1995-01-06
AU6200994A (en) 1994-10-24
CH687253A5 (de) 1996-10-31

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